Horner is preparing to embark on a new chapter at Red Bull, having decided to replace Sergio Perez with Liam Lawson in an effort to regain the constructors' title they lost to McLaren last year.
The Milton Keynes-based outfit endured a turbulent 2024 campaign, with both Perez and Max Verstappen struggling to find the consistency which made the team so dominant in recent years.
The latter did manage to rediscover some form in the closing stages to hold off the challenge of Lando Norris and deliver a fourth consecutive drivers' championship, while Perez ended a miserable year down in eighth.
With the off-season nearing its conclusion, it won't be long until Horner's attention turns back towards the world of F1, but he appears to have been enjoying his time away from the circuit.
The win was made all the more sweeter considering the horse failed to finish on its last outing at Worcestershire earlier this month.
The couple have owned the nine-year-old racehorse for a number of years, and is just one of many under their stewardship, with each named after a song from Geri's music career, including It's Raining Men and Look at Mee.